ATMEL ATR1874 10-channel high-speed photo detector ic for dvd/cd Datasheet

Features
•
•
•
•
•
•
•
•
650 nm and 780 nm Wavelengths Supported
150 MHz Data Channel Bandwidth
Fast Settling Time
4 Configurable Gain Steps
12 Photo Diodes
Low Offset Voltage
Power-down Mode
Pb-free Optical 16-pin Package
Applications
•
•
•
•
•
DVD +RW with CD-RW Capability
DVD -RW with CD-RW Capability
DVD-RAM with CD-RW Capability
DVD 18x Up to 20x Application
Recordable Optical Data Storage Devices
1. Description
The ATR1874 is a Photo Detector Integrated Circuit (PDIC) for operation in
high-speed DVD applications like DVD-RAM and DVD+/-RW at a wavelength of
650 nm and CD-RW at a wavelength of 780 nm. It includes 10 channels with 4 different gain steps. The four channels A, B, C, and D are high-speed channels whereas
the channels E1G1, E2G2, F1H1, F2H2 are high-gain channels at average speed for
tracking control, sector information etc. The remaining two channels RF+ and RF– are
RF paraphase outputs. Channels A to D are summed together at the RF outputs.
10-channel
High-speed
Photo Detector
IC for DVD/CD
ATR1874
Summary
Preliminary
Setting of the gain and entering/exiting sleep mode is controlled using the two tri-state
inputs SW1 and SW2.
All channels are set to tri-state during sleep mode.
Due to its small package size the ATR1874 is especially suited for application with
restricted height requirements like SLIM and UltraSLIM drives.
NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
4998AS–DVD–05/07
Figure 1-1.
Block Diagram
VCC
VZERO
2.05V
0.5*∑
VREF
∑ +
SW1
SW2
Gain
Switch
0.5*∑
∑ -
F2H2
F1H1
+
+
H1
H2
G1
G2
B
E2G2
E1G1
A
D
F1
F2
E1
GND
2
RF-
+
B
+
C
+
D
+
A
C
+
+
RF+
E2
GND
ATR1874 [Preliminary]
4998AS–DVD–05/07
ATR1874 [Preliminary]
2. Pin Configuration
Figure 2-1.
Table 2-1.
Pinning QFN16L
VREF
1
16
VCC
GND
2
15
GND
F2H2
3
14
B
F1H1
4
13
C
E1G1
5
12
D
E2G2
6
11
A
SW1
7
10
RF+
SW2
8
9
RF-
H1
Pin Description
Pin
Symbol
Type
1
VREF
Analog
Reference voltage
Function
2
GND
Supply
Ground
3
F2H2
Analog
Output channel F2H2
4
F1H1
Analog
Output channel F1H1
5
E1G1
Analog
Output channel E1G1
6
E2G2
Analog
Output channel E2G2
7
SW1
Tri-state
Gain switch
8
SW2
Tri-state
Gain switch
9
RF–
Analog
Output RF–
10
RF+
Analog
Output RF+
11
A
Analog
Output channel A
12
D
Analog
Output channel D
13
C
Analog
Output channel C
14
B
Analog
Output channel B
15
GND
Supply
Ground
16
VCC
Supply
Supply voltage
3
4998AS–DVD–05/07
3. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Value
Unit
Supply voltage
VCC
–0.5 to +6.0
V
Input voltage at any input
Vin
–0.5 to VCC – 0.5
V
Storage temperature
Tstg
–40 to +100
°C
Soldering temperature QFN_Open package
Tsol
260
°C
Symbol
Value
Unit
Supply voltage
VCC
4.5 to 5.5
V
Reference voltage
VREF
1.5 to 2.3
V
Operating temperature range
Tamb
0 to +80
°C
4. Recommended Operating Conditions
Parameters
4
ATR1874 [Preliminary]
4998AS–DVD–05/07
ATR1874 [Preliminary]
5. Photo Diode Arrangement
Figure 5-1.
Photo Diode Arrangement
f
b
H1
H2
c
f
G1
G2
Photo diode is symmetrically centered
to the center of the chip and package
Symmetrical axis is parallel to the package
e
d
a
B
C
d
f
D
A
f
a
e
F1
F2
c
f
E2
E1
b
f
5
4998AS–DVD–05/07
6. Ordering Information
Extended Type Number
Package
Remarks
ATR1874-PZQW
QFN_OPEN_4x3.5_16L
Taped and reeled, Pb-free
7. Package Information
Package: QFN_OPEN_4 x 3.5_16L_W1 x 1.06
Dimensions in mm
1
(0.26)
3.5±0.1
Drawing-No.: 6.543-5135.01-4
0±0.0508 (Pd Center to Pkg Center)
0.9±0.1
(0.4)
0.06
1.06
˚
8
0.23±0.05
16
16
15
14
13
12
11
10
1
2
3
4
5
6
7
9
8
0.2
0.65
0.4±0.1
0.25±0.08
0.25
15
4±0.1
1
0.2
0.2
Side View
Top View
0.65
0.5 nom.
A1 Corner
A1 Corner
Bottom View
0±0.0508 (Pd Center to Pkg Center)
technical drawings
according to DIN
specifications
Issue: 2; 18.01.07
6
ATR1874 [Preliminary]
4998AS–DVD–05/07
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